Throttle and ignition control



THROTTLE AND IGNITION CONTROL Filed April 7. 1951 Patented Mar. 15, 1932UNITED STATES PATENT. OF ICE;

GUGLIELMO PIRINOLI, OF TURIN, ITALY, ASSIGNOR TO FIAT SOCIETK ANONIMA,OF

TURIN,

ITALY THROTTLE ANIO IGNITION CONTROL Application filed April 7, 1931,Serial No. 528,382, and in Italy April 18, 1930.

"necessity of acting on the gas feed in such manner as to enable gradualvariations in the number of turns of the englne, while the 1gnitioncontrol is set once, when the minimum number of turns of the engine isexceeded.

Automatic ignition controls known heretofore are not largely employed aspilots generally prefer to have the engine wholly under their owncontrol moreover, in aircraft engines which have relatively lowrevolution speeds these devices do not always work satisfactorily orthey require frequent adjustments. I

This invention refers to a control device acting, through the operationof a lever, at the same time on the throttle valve of the carburetterand on the ignition, said two controls being always effected in arelation. to each other which can be determined at will. The leveroperated by the pilot is connected to the throttle valve operating meansand, when displaced, said lever acts with a determined transmissionratio on a driven member connected with the ignition control. In casethe driven member reaches the end of its stroke before the operatinglever, it is held immovable while the lever and the throttle operatingmeans can complete their stroke.

The accompanying drawings show by way of example a construction of theimproved control device. 7

Figure 1 is a cross section and Figures 2 and 3 are two elevationsthereof showing the operating lever in its end positions, respectively.

The device according to this invention comprises a bed plate 1 on whicha spindle 2 is rotatably mounted, said spindle carrying at one end aplate 3 provided with an operating handle 4. Under the plate 3 a secondplate 5 is arranged on which a pivot 6 is rigidly mounted.

The plate 1 is provided with a pivot 7 on which a third plate 8 isrotatably mounted. The plate 8 is provided with a knob 9 for acting witha suitable transmissionratio on the ignition. The plate 8 isprovidedfront of the rotatable plate 3 with a notch 10* re.- ceiving the pivot 6of the plate 5 and with a sector-shaped cut 11 adapted to embrace theperiphery of the plate 3 in certain conditions.

l The working of the device is as follows The handle 4 (Fig. 2). isdisplaced and while the plate 3 rotates through an angle 0c the pivotThe ratio between the movements of the plate 8 controlling the-ignitionand those of the plate 3 of the gas feed can of course be other thanthat shown above, as it depends substantially upon the respectiveposition of the axes of rotation of the plates 3 and 8 and upon thedistances ofthese latter from the pivot 6 and its notch.

lVhat I claim is:

1. Throttle and ignition control comprising a bed plate, two parallelpivots secured to said bed plate, a disk rotatably mounted on each ofsaid pivots, one of said disks being adapted to control the throttlevalve of an internal combustion engine, while the other disk is adaptedto control the ignition of said engine, a notch and toothcouplingbetween said two disks such that the motion from one disk to the otheris transmitted with a predetermined ratio and an operating lever securedto the disk controlling the throttle.

2. .Throttle; and ignition control comprising a bed plate, two parallelpins secured to said bed plate, a disk rotatably mounted on each of saidpins, one of said disks being; adapted to operate the throttle valve ofan internal combustion engine, while the other disk is adapted tocontrol the ignition ofsaid engine, a tooth carried by the firstmentioned disk and adapted to engage'a notch on the -10( secondmentioned disk so that this latter follows the former disk on a firstportion of its stroke, stop surfaces for holding the second disk inadjusted position during the further 5 angular displacement of the firstdisk and an operating lever secured to the first disk.

In'testimony that I claim the foregoing as my invention I have signed myname.

G-UGLIELMO .PIRINOLI. V

